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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>G’day Vianney et al,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I think it was mentioned in this list not that long ago that a “floating
drum” storage offers a good, simple way of measuring gas production. You
just record the change in height of the drum and volume of gas = area * height
(area of a circle = pi Dsquared/4 or pi Rsquared and there are 1000 litres in a
cubic metre). If you want more accuracy use a small diameter drum with greater
height to get the necessary capacity. Pressure and volume of any gas are
related by p1v1=p2v2, where p is pressure, v is volume and 1 represents the
initial conditions and 2 is the final conditions. Mass and volume are related by
density, where Density = Mass/Volume and the density of biogas is about 1.18
kg/m3. The easiest way to develop the pressure needed for burners etc is to add
weight to the drum (bigger diameter – more weight, since Pressure =
kg*9.8/sq.metres) and if you measure “pressure” in mm of water you
need to know Pressure (Pa) = 9.8 *Height (mm). I think that should let
you calculate anything you need and I hope you understand the “useful”
metric units I have used. I will put an example (and possibly a spreadsheet
calculator!) on the biogas wiki.<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Happy Digesting,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>HOOROO<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Mr. Paul Harris, Room S116b, Waite Main Building Faculty of
Sciences, The University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA
5064 Ph : +61 8 8303 7880
Fax : +61 8 8303 4386 <a
href="mailto:paul.harris@adelaide.edu.au"><span style='color:blue'>mailto:paul.harris@adelaide.edu.au</span></a>
<a href="http://www.adelaide.edu.au/directory/paul.harris"><span
style='color:blue'>http://www.adelaide.edu.au/directory/paul.harris</span></a><o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>CRICOS Provider Number 00123M<o:p></o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> digestion-bounces@lists.bioenergylists.org
[mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Vianney
Tumwesige<br>
<b>Sent:</b> Monday, 22 November 2010 5:41 PM<br>
<b>To:</b> For Discussion of Anaerobic Digestion<br>
<b>Subject:</b> [Digestion] Accurate Biogas Yeild<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hello AD friends,<br>
<br>
Hope everyone is fine. Back to business, how would you measure the biogas yield
of a system? LPG is measure in Kg and the user can tell how much gas he
consumes. Biogas being stored in a volume (liters or cubic meters) makes it
hard to relate to pressure (of the biogas). Have you been able to find a
system pressure system good for Africa?<br>
<br>
Thanks<br clear=all>
<br>
-- <br>
Vianney Tumwesige<o:p></o:p></p>
<p class=MsoNormal>Director - Green Heat (U) Ltd <img border=0 width=20
height=20 id="_x0000_i1025"
src="http://c/photos/public/AIbEiAIAAABECOv50_eundi67QEiC3ZjYXJkX3Bob3RvKigwYzZmY2VhNzIxN2U0MzAxZDgzMjIzMjQwMTIyYjc4NmIxZDIyZTVkMAEoE3_PbMYF3svhn4g5QGXXnlOrRw"
alt=Picture><br>
P.O. Box 10235<br>
Kampala-Uganda<br>
256 (0) 71 237 9889<o:p></o:p></p>
<p class=MsoNormal><br>
"The more people are self sufficient in cooking fuel, the more personal
and financial freedom they have." - Emma Casson<o:p></o:p></p>
<p class=MsoNormal><br>
<a href="http://trustvianney.wordpress.com/" target="_blank"><br>
</a><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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